'Atlas for the end of the world' offers a path to protecting biodiversity

It's been 47 years since Philadelphians filled Fairmount Park for the first Earth Day here, led by a group of University of Pennsylvania students. This year, amidst the day's celebrations and other collective observances comes word that, if humankind is to truly coexist with biodiversity, we have to re-structure our landscapes on a vast scale.Read more ...